Used to make a living out of burning slash piles. For hard to start piles such as old "bone" piles (slash piles with the fine fuels either burned out or fallen and rotten), or very wet or snow covered piles, I mixed aluma-gel and gasoline (makes a jelly or gelatenous like napalm), poured into sandwich baggies whereby you can light the baggie and toss into the pile (doesn't explode like raw gas). Burns slowly, drips, & drools, starting a hot convective heat collumn in the pile that will get the pile going. We used to load all the baggies in our tree planting bags and carry up the mountain going from pile to pile. This is primarily for production burning and very old or wet/snow covered piles. Otherwise a drip torch works fine and often, we used our tree marking paint guns loaded with a bit of diesel or used motor oil to fire up old piles (kinda has a blow torch effect). Note: Incidentally, here in Texas now I keep my old tree marking paint gun handy on the tractor loaded with a bit of gas, diesel, or used motor oil primarily to neutralize wasp nests around the out buildings. Hope this helps. 4T